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stdarray.py
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stdarray.py
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"""
stdarray.py
The stdarray module defines functions related to creating, reading,
and writing one- and two-dimensional arrays.
"""
import stdio
#=======================================================================
# Array creation functions
#=======================================================================
def create1D(length, value):
"""
Create and return a 1D array containing 'length' elements, each
initialized to 'value'.
"""
return [value] * length
#-----------------------------------------------------------------------
def create2D(rowCount, colCount, value):
"""
Create and return a 2D array having 'rowCount' rows and 'colCount'
columns, with each element initialized to 'value'.
"""
a = [None] * rowCount
for row in range(rowCount):
a[row] = [value] * colCount
return a
#=======================================================================
# Array writing functions
#=======================================================================
def write1D(a):
"""
Write array 'a' to sys.stdout. First write its length.
"""
length = len(a)
stdio.writeln(length)
for i in range(length):
# stdio.writef('%9.5f ', a[i])
stdio.write(a[i])
stdio.write(' ')
stdio.writeln()
#-----------------------------------------------------------------------
def write2D(a):
"""
Write two-dimensional array 'a' to sys.stdout. First write its
dimensions.
"""
rowCount = len(a)
colCount = len(a[0])
stdio.writeln(str(rowCount) + ' ' + str(colCount))
for row in range(rowCount):
for col in range(colCount):
#stdio.writef('%9.5f ', a[row][col])
stdio.write(a[row][col])
stdio.write(' ')
stdio.writeln()
#=======================================================================
# Array reading functions
#=======================================================================
def readInt1D():
"""
Read from sys.stdin and return an array of integers. An integer at
the beginning of sys.stdin defines the array's length.
"""
count = stdio.readInt()
a = create1D(count, None)
for i in range(count):
a[i] = stdio.readInt()
return a
#-----------------------------------------------------------------------
def readInt2D():
"""
Read from sys.stdin and return a two-dimensional array of integers.
Two integers at the beginning of sys.stdin define the array's
dimensions.
"""
rowCount = stdio.readInt()
colCount = stdio.readInt()
a = create2D(rowCount, colCount, 0)
for row in range(rowCount):
for col in range(colCount):
a[row][col] = stdio.readInt()
return a
#-----------------------------------------------------------------------
def readFloat1D():
"""
Read from sys.stdin and return an array of floats. An integer at the
beginning of sys.stdin defines the array's length.
"""
count = stdio.readInt()
a = create1D(count, None)
for i in range(count):
a[i] = stdio.readFloat()
return a
#-----------------------------------------------------------------------
def readFloat2D():
"""
Read from sys.stdin and return a two-dimensional array of floats.
Two integers at the beginning of sys.stdin define the array's
dimensions.
"""
rowCount = stdio.readInt()
colCount = stdio.readInt()
a = create2D(rowCount, colCount, 0.0)
for row in range(rowCount):
for col in range(colCount):
a[row][col] = stdio.readFloat()
return a
#-----------------------------------------------------------------------
def readBoolean1D():
"""
Read from sys.stdin and return an array of booleans. An integer at
the beginning of sys.stdin defines the array's length.
"""
count = stdio.readInt()
a = create1D(count, None)
for i in range(count):
a[i] = stdio.readBool()
return a
#-----------------------------------------------------------------------
def readBoolean2D():
"""
Read from sys.stdin and return a two-dimensional array of booleans.
Two integers at the beginning of sys.stdin define the array's
dimensions.
"""
rowCount = stdio.readInt()
colCount = stdio.readInt()
a = create2D(rowCount, colCount, False)
for row in range(rowCount):
for col in range(colCount):
a[row][col] = stdio.readBool()
return a
#=======================================================================
def main():
"""
For testing.
"""
write2D(readFloat2D())
if __name__ == '__main__':
main()